<button class="theme-mode-toggle">
  <span class="material-icons" *ngIf="theme === 'dark'" (click)="toggleTheme()">
    light_mode
  </span>
  <span
    class="material-icons"
    *ngIf="theme === 'light'"
    (click)="toggleTheme()"
  >
    dark_mode
  </span>
</button>
